Posties will be able to put flags up in offices Picture: Allan Hutchings

Royal Mail explained that employees can still put up flags in offices, with mail centres already having flags on display usually representing the countries workers come from.

According to the postal service the policy banning flags from vehicles has been in place for a number of years.

A Royal Mail spokesman said: ‘Flags should not be flown on vehicles as Royal Mail has a duty of care both to all employees and to members of the public.

‘This is a company-wide policy across the business which covers flags and stickers across trollies, bikes, vans and lorries. No other flag or insignia should be carried next to the Royal Mail brand and insignias.